Myself, i have purchased 2 of them nfpj plugs. The first plug with the brazed in vent liner had the flash hole in the vent liner erode to 0.035" in 108 shots. At that time i drilled out the vent liner, and kinda reworked the threads. A new vent liner was installed, and has worked good. Drilling out the brazed vent liner dulled my drills, but it seemed worthwhile to me, so i will do it again on the second nfpj.

The second nfpj now has 87 shots through it. It's flash hole has eroded to 0.034" at this time.

I kinda thought the rapid erosion rate of the first plug was an anomally, but it turns out both these plugs show/showed similar rates of erosion.

The rapid erosion of these plugs is not considered an issue by me, because the brazed in vent liner is readily removed. Chances are i won't ever purchase another nfpj plug; the ones i have will last me hundreds, or perhaps even thousands of shots.


I have done a little experimenting with free floating the barrel on my 2 disc rifles. I can't say i have the answer, but what i ended up doing is shimming the stock with tape just ahead of the lug screw, and also doing some sanding in the barrel channel. My rifles are both shooting better now than they did when new, but perhaps it is just because they are becoming 'broken' in.